Apparatus for mixing and burning oil



May 2%, 1928. 1,671,238

A.E.GRANT APPARATUS FOR MIXING AND BURNING OIL Filed Feb. 21. 1920 4Sheets-Sheet 1 INVENTOR ATTORNEYS May 29, 1928. 1,671,238 A. E. GRANTAPPARATUS FOR MIXING AND BURNING on;

Filed Feb. 21. 1920 4 Sheets-Sheet 2 jr m rs May 29, 1928.

A. E. GRANT APPARATUS FOR MIXING AND BURNING OIL 7 Filed Feb. 21, 1920 4t 5h t 3 7 1 J A Al 9 4/ v IV. V A I no 1. 4 7 f i re 5 1 1 K R/VEYS 4Sheets-Sheet m mb W I a V \mm 1 Q E 0 m May 29. 1928.

- A. E. GRANT APPARATUS FOR MIXING AND BURNING OIL Filed Feb. 21 1920HJH vllllrlflrlllllllrllv 3 Ex B Patented May 29, 1928.

UNITED STATES PATENT OFFICE.

ALBERT E. GRANT, OF

TION, A CORPORATION OF DELAWARE.

APPARATUS FOR MIXING AND BURNING OIL.

Application filed February 21, 1920. Serial No. 360,516.

This invention relates to oil burners and particularly to a method andapparatus for providing a combustible mixture of oiland air. The chiefobject of the invention is to provide for the vaporization of the oil byhighly heated gases such as steam with the admixturev of air to form acomposition burning with a hot flame of large volume and without theaccumulation of a carbon deposit.

A further object of the invention is to provide simple and easily andsafely operated apparatus for thus mixing the oil and air.

In the accompanying drawings illustrating one embodiment of theinvention in a burner Fig. 1 is a diagrammatic elevation of the mixingand burning apparatus in connection with the flames to be heated by theburner,

Fig. 2 is a sectional elevation of a portion of Fig. 1,

Fig. 3 is a and superheater,

Figs. 4 and'5 are respectively front and sectional views thereof andFig. 6 is an enlarged sectional elevation of a portion of the mixingapparatus.

In the process of this invention a fluid such as water preferably undersubstantially constant head is fed, for instance from a tank 10 throughpipe 11 to a cross pipe 12 which distributes it to the opposite ends 13and 14 of a boiler and superheater 15 heated in any desirable manner.The water entering at 13 and 14 passes into'the boiler tubes 16 and 17where it is vaporized and on into the tubes 18and 19 where it issuperheated and passed out at 20 through a pipe 21 connected to a steamjet supply 22 through a regulating needle valve 23 (see Fig. 6) a funnelbeing provided to carry away any water overflow.

The I superheated steam is passed on through pipe section 24 to nozzlechamber 25 and out through nozzle 26 where it issues as .a. jet formingaround it a vacuum area at 27. In this vacuum area 27 is placed theupper end 28 of an oil supply tube 29 receiving oil from a substantiallyconstant oil level supply means maintaining the level of the oil in tube29 considerably below the end 28 so that suction will be required todraw the oil up and out of the tube 29 and in the absence of suchsuction the oil level will recede be low the outlet 28. Such oil supplymeans may for instance be a barrel connected horizontal section of theboiler by siphon 36 to a tank 37 a small hand operated pump 38 and checkvalve 39 being provided to start the flow through the siphon. As the oilpasses over through the pipe 36 it will fillthe lower tank 37 and raisethe float 40 to close valve 41 and. shut off the siphon supply and thisflow and siphon will maintain constant level in the tank 37 so that thejet from the nozzle 26 will work against a substantially constantsuction in the oil pipe 29.

The jet of superheated steam issuing from nozzle 26 will thus draw upand vaporize a supply of oil from tube 29 and in the specific embodimentof the invention shown in the drawings there will also be drawn in bythe steam jet a supply of air through the pipe 42 the end 42 of which isalso positioned in the vacuum space surrounding the jet. The

mixed jet of steam, oil and air isthen directed through the nozzle 43around which is a second or auxiliary steam nozzle 44 receiving itssteam supply through the branch 45 from the supply 22. The nozzles 43and 44 are preferably concentric and so arranged that the auxiliarysteam jet is in an annular sheet surrounding the central jet of steam,oil and air. This secondary jet further vaporizes the oil and mixes thesteam, oil and air into a rapidly projected jet issuing into the tube ofthe burner which is preferably provided with air passages 51 and airholes 52 supplying further air to the final jet.

The jet issuing from the nozzles 43 and 44 is a highly inflammable andthorough mixture of steam, oil and air and will burn with a hot flame oflarge volume and without the deposit of any carbon or soot. In this specific embodiment of the invention shown in Fig. 1 this flame from tube50 is directed downward at an angle under the boiler and superheater 15standing on legs 54 on a fire brick 55 which may for instance be placedover the grate g of the usual steam boiler furnace. The flame curvesupward around the tubes of the boiler and superheater 15 and extendsupward to heat the tubes or water compartments of the boiler 56, the hotproducts of combustion finally passing out through the usual chimneyflue.

The control of the flame is exerted through needle valve 23 of spindle6O threaded through nut 61 and packed. at 62 to be steam tight andcarrying a hand wheel 63. The

priming;

.tos or similar material handle 74.

must be removed from under the boiler 15 and pad 73 saturated with oilalteravhich it,

greater the opening of the valve 23, the

greater \villibe the pressure off the steamin the steam openings 51giving 1a large volume with properly proportioned const tuents. In thestructure of the mix ng apparatus SllQWItll'l the drawings (see Fig". 6)all the parts are adjustable but predetermined in size justment and theuser is limitedfsimply to theturn'ing o'tthehandvvheelbi; The parts;

of this mixer are easily constr ctedand assembled, 'c heapening the costproduction and malring the structure convenient torture: pairsreplacements.

Inthe specific embodil ent ot the invention sbo vn in the vdrawings thetank 1Q ,for a the wateflsupply is preferably a constant level tankconveniently located in the, build ing Where the heater isinstalled. Byfeeding the water to theopposite ends 13 and 14: of the boiler and'superheater two parallel passages forthe steam are provided and con;

nectedat so that fluctuationsdn pressure- Will, be taken careof andequalized Within the heater itsel'f and, Without causing surging of-thepressure and consequent inequali The boiler and superheaten tubes 16,17; 18 and 19 are preferably packed,

ties in the flame.

as indicated \vitli small;balls of Monel metal which provideadditional-heating surface and act to restrict and make tortuous; thepassage through thetubes, and also by their relative movement preventthe accumulation of scale. ll he boiler and superheater 15 is mounted onlegs 54 not only to permit the free play 01 the flame from underneathbut also to provide space for the removable pan 71 which is initiallycharged With oil and ignited to start the ,burner, This pan comprises ashallowmetal container 72 filled With a porous pad.73 ofl ashesandprovided With a To charge this pan with oil it is reinserted under theboiler and iguitedand removed after the main burner begins to" function.With this arrangement 'it is therefore impossible to pour the oil influid condition near the surfaces which are liable to be heated near theflash point of the oil andthepriming charge of oil When inserted .1 orv. in. 1 -m1xes and remixes the steam, 011 and air but iscorrespondingly increased as is also et througlrthe surrounding noz-gzle 4st Z111l lll0l.6flll is drawn in through the a d a l-I trolled by,said steam under the, ooiler will necessarily becontained in thesaturated pad 73 and so cannot cause an explosion.

The process of this inventionnot only 70 also permits "of easy controlof the mixture by. a single, adjustment. The apparatus shownissimpleinsti'iicture and efiicient and safe muse It, is easilyinstalled and after installation requires no attention except the es ryeg l t on Qti lie iae'ofithe flam y urn ng; he, s ngle andl r iiaherough v poriza i n i l-e l llllr lt e ah. m naot hesans heste t s-eair and oil producesa composit o u g ee with an ensely h t-fl me t,ai'sev lwna; w i h amend v r; t i ati ely 991i .11%, faces to beheatedzwithout the deposit cheap ee. T e pa atusautilizinathisprote tstherefore clean and eflicient and odor essin, usefully consuming all; ofthe, fpel snp I claim: D

1. Apparatus for vaporizing o mix-Ing Oil "c mr i i gn ans dapted; mi. tam. j and a valve adapte to 041 team, j t, means dapted e; s pply; Q odam 1 je id il; upplvfieiw Qll'l. l edz y a t ma br v lve. tast -need esimultaneous y supplyai e-sa' dio l supply steam jet, and a sprocket andchain QOIllleQti ing said: steam; v lve nd; air iva y uwh hy movement ofthe steam va-lvea wi ll; controh;

the a steam, oil and, air supplies.

Apparafius or vaporiz ng i s er. we; burner comprising means adapted tofgrm 109 a eambjet, r team wa ve. a apted .i eeeq z troll said s eam jme ns dapted to; upply oilto saidlsteam jet,ian;air;yalve geared, to.said steam valve toi perat imultan ous-1; 1y; therewithandadaptedijtovsuppl t air -to 10! saidstearn. jet, and a ec nd ineansadapt d; to fornra second steam j' tl q Qmbji nQnWi h/l the mixtureofoil,airand steama, f

3/ Apparatus :for vaporizingj, oil for, a burner com prising means,adapterl 1;to fo;r a steanrjet, asteam valveadaptedmo co tI' lSaidlsteam jet, means a'daptedgwtog sup ;T

1 ply? oilto said steamjet, an air valye gearedf to said steam valve tooperate simultaneousg 1y therewith. and a adaptedLtohsupplyZt-llfltddlfl said steam jet, a secondmeansfladapted to; form a secondsteamjet to acombi'neawithfthe mixture, of oil, airwan'd steam, and;a,., see.-I 0nd means adapted to supply air to theinajin mixture ofoil, air. and steam;

4. Apparatus for vaporizing oili for, a; burner comprising means adaptedto form Steam j te mva ve danted to was, trol said steam jet, meansadapted to supigf p y Oil Said t a i ty ai lbeii g- 9 j n airiv lvageard to sai d steam valve to operate simultaneo ly therewit-h qandjsupplyMair to said (st; j et, 1 and a 2 second 4 means adapted 1 form a ewed rmindli g, was i t' f ea-t e a combine with the mixture of oil, air andsteam controlled by said steam valve.

5. Apparatus for vaporizing oil for a burner comprising means adapted toform a steam jet, a valve adapted to control the steam jet, meansadapted to supply oil to said steam jet, an air valve geared to saidsteam valve to operate simultaneously there With and adapted to supplyair to said steam jet, and a second means adapted to supply 10 air tothe main mixture of oil, air and steam independent of the main mixture.

ALBERT E. GRANT.

